no scrolling of shell command completions buffer

[Dan Jacobson]

In GNU Emacs 21.3.2 (i386-pc-linux-gnu, X toolkit)
 of 2003-08-14 on raven, modified by Debian
configured using `configure  i386-linux --prefix=/usr --sharedstatedir=/var/lib 
--libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info 
--mandir=/usr/share/man --with-pop=yes --with-x=yes --with-x-toolkit=athena 
--without-toolkit-scroll-bars --without-gif'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: C
  value of $LC_CTYPE: zh_TW.Big5
  value of $LC_MESSAGES: C
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: zh_TW.Big5
  locale-coding-system: chinese-big5
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

it didn't scroll the other window when given more tabs

Recent input:
ESC x s h e RET i TAB TAB TAB TAB TAB TAB TAB ESC x 
r e p o TAB TAB r TAB RET

Recent messages:
Completing command name...
Hit space to flush
Completing command name...
Hit space to flush
Completing command name...
Hit space to flush
Completing command name...
Hit space to flush
Making completion list...
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